scholarly journals Observation of a highly spin-polarized topological surface state in GeBi2Te4

2012 ◽  
Vol 86 (19) ◽  
Author(s):  
K. Okamoto ◽  
K. Kuroda ◽  
H. Miyahara ◽  
K. Miyamoto ◽  
T. Okuda ◽  
...  
Keyword(s):  
Surface State ◽  
Spin Polarized ◽  
Topological Surface ◽  
Topological Surface State

scholarly journals Deep tuning of photo-thermoelectricity in topological surface states

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shouyuan Huang ◽  
Ireneusz Miotkowski ◽  
Yong P. Chen ◽  
Xianfan Xu
Keyword(s):  
Surface State ◽  
Spin Injection ◽  
Three Dimensional ◽  
Polarized Light ◽  
Surface States ◽  
Linear Dispersion ◽  
Circularly Polarized Light ◽  
Spin Polarized ◽  
Topological Surface ◽  
Topological Surface State

Abstract Three-dimensional topological insulators have been demonstrated in recent years, which possess intriguing gapless, spin-polarized Dirac states with linear dispersion only on the surface. The spin polarization of the topological surface states is also locked to its momentum, which allows controlling motion of electrons using optical helicity, i.e., circularly polarized light. The electrical and thermal transport can also be significantly tuned by the helicity-control of surface state electrons. Here, we report studies of photo-thermoelectric effect of the topological surface states in Bi2Te2Se thin films with large tunability using varied gate voltages and optical helicity. The Seebeck coefficient can be altered by more than five times compared to the case without spin injection. This deep tuning is originated from the optical helicity-induced photocurrent which is shown to be enhanced, reduced, turned off, and even inverted due to the change of the accessed band structures by electrical gating. The helicity-selected topological surface state thus has a large effect on thermoelectric transport, demonstrating great opportunities for realizing helicity control of optoelectronic and thermal devices.

Ultrafast spin-polarized electron dynamics in the unoccupied topological surface state of Bi2Se3

2017 ◽  
Vol 29 (30) ◽  
pp. 30LT01 ◽  
Author(s):  
D Bugini ◽  
F Boschini ◽  
H Hedayat ◽  
H Yi ◽  
C Chen ◽  
...  
Keyword(s):  
Surface State ◽  
Electron Dynamics ◽  
Spin Polarized ◽  
Topological Surface ◽  
Topological Surface State

scholarly journals Spin-polarized surface resonances accompanying topological surface state formation

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Chris Jozwiak ◽  
Jonathan A. Sobota ◽  
Kenneth Gotlieb ◽  
Alexander F. Kemper ◽  
Costel R. Rotundu ◽  
...  
Keyword(s):  
State Formation ◽  
Surface State ◽  
Spin Polarized ◽  
Topological Surface ◽  
Polarized Surface ◽  
Topological Surface State

Topological Surface State in Epitaxial Zigzag Graphene Nanoribbons

Nano Letters ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2876-2882
Author(s):  
Thi Thuy Nhung Nguyen ◽  
Niels de Vries ◽  
Hrag Karakachian ◽  
Markus Gruschwitz ◽  
Johannes Aprojanz ◽  
...  
Keyword(s):  
Surface State ◽  
Graphene Nanoribbons ◽  
Topological Surface ◽  
Topological Surface State ◽  
Zigzag Graphene Nanoribbons

scholarly journals Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Hemian Yi ◽  
Zhijun Wang ◽  
Chaoyu Chen ◽  
Youguo Shi ◽  
Ya Feng ◽  
...  
Keyword(s):  
Surface State ◽  
Three Dimensional ◽  
Dirac Semimetal ◽  
Topological Surface ◽  
Topological Surface State

scholarly journals Persistent Topological Surface State at the Interface of Bi2Se3Film Grown on Patterned Graphene

ACS Nano ◽  
2014 ◽  
Vol 8 (2) ◽  
pp. 1154-1160 ◽  
Author(s):  
Namdong Kim ◽  
Paengro Lee ◽  
Youngwook Kim ◽  
Jun Sung Kim ◽  
Yongsam Kim ◽  
...  
Keyword(s):  
Surface State ◽  
Topological Surface ◽  
Topological Surface State

scholarly journals Tailoring the topological surface state in ultrathin α -Sn(111) films

2019 ◽  
Vol 100 (24) ◽  
Author(s):  
V. A. Rogalev ◽  
F. Reis ◽  
F. Adler ◽  
M. Bauernfeind ◽  
J. Erhardt ◽  
...  
Keyword(s):  
Surface State ◽  
Topological Surface ◽  
Topological Surface State

scholarly journals Experimental evidence of anomalously large superconducting gap on topological surface state of β-Bi2Pd film

2019 ◽  
Vol 64 (17) ◽  
pp. 1215-1221 ◽  
Author(s):  
Jian-Yu Guan ◽  
Lingyuan Kong ◽  
Li-Qin Zhou ◽  
Yi-Gui Zhong ◽  
Hang Li ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Surface State ◽  
Superconducting Gap ◽  
Topological Surface ◽  
Topological Surface State
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